[Boatanchors] Repair of B&W Tank Circuit

Mon, 26 Apr 2004 20:58:55 -0400

I repaired one awhile back that had part of the plastic strips coming 
loose. I used epoxy and a couple of new strips of lexan. Put the epoxy 
on the coil and clamp a plastic strip on each side with some small C 
clamps to hold the strips to the coil while the epoxy cures. Get the 
epoxy between the turns some.

If some of the plastic is intact, don't disturb it. It will hold the 
spacing of the coil while you work on one of the other strips. When that 
one sets up the coil will be more stable and you can go to the next strip.

73
Gary  K4FMX

Mike Clarson wrote:
> Gentlemen: I have recently aquired a B&W LPA-1 "Widowmaker" linear
> amplifier. No interlocks, plenty of exposed HV under the easy to open cover,
> and, just for fun, exposed 120 volt terminals on the back of the power
> supply. 4 866s powering 2 813s. The tank coil used to have plastic keeping
> it rigid, however, this palstic has turned to some grey shards of some other
> flakey substance. It is one of the standard B&W tank circuits with the
> switch. Has anyone referbished one of these tanks and repaired the coil? I
> am open to suggestions before attempting trial and error repair
> mysef. --Mike, WV2ZOW
> 
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